Dual-tip marker



FIG. 1 is a front left perspective view of a dual-tip marker showing our new design;

FIG. 2 is an exploded front left perspective view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a front elevation view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a left side elevation view thereof;

FIG. 9 is a left side elevation view of the dual-tip marker shown in FIG. 1, with the bottom end cap removed and placed on the opposite end of the highlighter; and,

FIG. 10 is a right side elevation view of the dual-tip marker shown in FIG. 1, with the top end cap removed and placed on the opposite end of the highlighter. 

The ornamental design for a dual-tip marker, as shown and described. 